Exhausting spring structure for high-pressure discharging pipe of compressor

ABSTRACT

The present invention relates to a high-pressure discharging pipe of a reciprocating motion compressor as a discharging way of compressed coolant from the compressor, which particularly improves a structure of the exhausting spring for the high-pressure discharging pipe for reducing vibration of the high-pressure discharging pipe, an vibrating noise of the compressor simultaneously and improving a confidence by progressing the exhaust in the high-pressure pipe with avoiding peculiar frequency generated from a predetermined revolution times of the compressor. It is an object of the present invention to provide an exhausting structure for a high-pressure discharging pipe of a compressor for reducing vibration of the high-pressure discharging pipe, an vibrating noise of the compressor simultaneously and improving a confidence by progressing the exhaust in the high-pressure pipe with avoiding peculiar frequency generated from a predetermined revolution times (for example, 3800 rpm) of the compressor through applying an uneven-typed exhausting spring  25  capable of reducing the vibration transferred to the high-pressure discharging pipe of the compressor. The present invention comprises an suction step for flowing the coolant sucked through an sucking pipe into a cylinder after passing through an sucking muffler, a cylinder head and a valve device; a compression step for compressing the sucked coolant by a reciprocating motion of a piston in a straight line according to the rotation of a crankshaft; and a discharging step for discharging the compressed coolant inside the cylinder to outside according to the discharging through the valve device and the cylinder head. The exhausting spring as a mass member is mounted to reduce noise or vibration on the outer surface of the high-pressure discharging pipe body, which is a discharging path of the compressed coolant, and control the mass by not equalizing the external diameter of the exhausting spring.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a high-pressure discharging pipe of a reciprocating motion compressor as a discharging way of compressed coolant from the compressor, and more particularly to a structure of the exhausting spring for the high-pressure discharging pipe for reducing vibration of the high-pressure discharging pipe, an vibrating noise of the compressor simultaneously and improving a confidence by progressing the exhaust in the high-pressure pipe with avoiding peculiar frequency generated from a predetermined revolution times of the compressor.

[0003] 2. Description of the Background Art

[0004] A closed compressor generally includes an electric system 5 having a stator 3 and a rotor (now shown) inside the upper and lower containers 1 and 2, and a compressing system 7 discharging coolant after sucking and compressing by a rotating motion of a crankshaft 6 which is indentation-fixed on a center of the rotor as shown in FIG. 4.

[0005] The compressing system 7 includes a cylinder block 9 unified with a cylinder 8 forming an exhausting space of the coolant, a piston (now shown) coupled with the crank shaft 6 for reciprocatively motioning in a straight line inside the cylinder 8, a cylinder head 11 fixed as an open state on an end of the cylinder 8 and a valve device 12 for sucking the coolant into the cylinder 8 and discharging the compressing coolant lain between the cylinder 8 and the cylinder head 11.

[0006] An sucking muffler 13 having a stated shape on the upper part of the cylinder head 1 is fixed as an attached type with the stator 3 and coupled with an sucking pipe 14 penetrated through the lower container 2.

[0007] The general closed compressor included as like the above repeats the following discharging steps. Sucked coolant passed through the sucking pipe 14 passes by the sucking muffler 13, the cylinder head 11 and the valve device 12, and then flows into the cylinder 8 in the sucking step. The sucked coolant is compressed by a reciprocating motion in a straight line of a piston according to a rotation of the crankshaft 6 in the compressing step. The coolant compressed in the cylinder 8 is discharging to outside according to the course of discharging through the valve 12 and the cylinder head 11 again in the discharging step.

[0008] In the discharging step, a half-circular discharging muffler 21 is mounted on the lower side of the cylinder block 9 and connected to the discharging space of the cylinder head 11 for passing through.

[0009] A high-pressure discharging pipe 22 is connectedly fixed to the discharging muffler 21 as a shape of surrounding the stator 3 and one end of the high-pressure discharging pipe 22 is fixed by welding to an connectedly fixed discharging pipe (not shown) for penetrating through the lower container 2.

[0010] Accordingly, the coolant compressed inside the cylinder 8 flows into the discharging muffler 21 after passing through the discharging space of the cylinder head 11 and escapes from the closed compressor through the discharging pipe after passing the high-pressure discharging pipe 22.

[0011] At this time, the compressed coolant generates a vibration when passing through the high-pressure discharging pipe that is comparatively narrow and the vibration is shown as periodic noise or vibration of specified frequency by converting to a vibrating sound wave. Thus, a cylindrical exhausting spring 24 is formed for coupling on the outer surface of the high-pressure discharging pipe as log as a required length for reducing the noise or vibration.

[0012] The cylindrical exhausting spring 24 is strengthened the mass of the high-pressure brown pipe and performs to reduce vibrating noise by the exhausting process of itself.

[0013] However, there is no concrete means to improve a vibrating problem of a specified problematic frequency band generated in using the cylindrical exhausting spring 24. Only a variation of the problematic frequency band is observed by a minute control of the wire diameter, inner diameter or pitch of the spring. The maximum vibration plan is difficult as much as like that which one may be shown as an improved vibrating effect of the practical problematic frequency among the plurality of designing factors.

[0014] The cylindrical exhausting spring 24 used for the existing high-pressure discharging pipe was not an active vibration reducing method to improve the definite problematic frequency band.

SUMMARY OF THE INVENTION

[0015] To resolve the above problems, it is an object of the present invention to provide an exhausting structure for a high-pressure discharging pipe of a compressor for reducing vibration of the high-pressure discharging pipe, an vibrating noise of the compressor simultaneously and improving a confidence by progressing the exhaust in the high-pressure pipe with avoiding peculiar frequency generated from a predetermined revolution times (for example, 3800 rpm) of the compressor through applying an uneven-typed exhausting spring 25 capable of reducing the vibration transferred to the high-pressure discharging pipe of the compressor.

[0016] The exhausting spring for a high-pressure discharging pipe of a compressor repeatedly comprises the steps of an suction for flowing a coolant sucked through an sucking pipe into a cylinder after passing through an sucking muffler, a cylinder head and a valve device; a compression for compressing said sucked coolant by a reciprocating motion of a piston in a straight line according to a rotation of a crankshaft; and a discharging for discharging said compressed coolant inside the cylinder to the outside according to a course of discharging through the valve device and the cylinder head, wherein characterized in that the exhausting spring as a mass member is mounted to reduce noise or vibration on the outer surface of the high-pressure discharging pipe body that is the discharging path of the compressed coolant and controls the mass by not equalizing the surrounded outer diameter of the exhausting spring.

BRIEF EXPLANATION OF THE DRAWINGS

[0017] The above objectives and advantages will become more apparent with the following explanation made with reference to the accompanying drawings, in which:

[0018]FIG. 1 illustrates an uneven-type exhausting spring for a high-pressure discharging pipe according to the present invention;

[0019]FIG. 2 is a view illustrating a principle of a vibrating exhausting device according to the present invention;

[0020]FIG. 3 illustrates an expanded-type of an exhausting spring for the high-pressure discharging pipe according to another embodiment of the present invention;

[0021]FIG. 4 is a cross-sectional view of an internal structure of a closed compressor in gerneral; and

[0022]FIG. 5 illustrates a cylindrical exhausting spring for a high-pressure discharging pipe of a closed compressor in general.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The structure of the present invention will now be explained in detail with reference to the accompanying drawings.

[0024]FIG. 4 illustrates a cross-sectional view of the internal structure of the general closed compressor. The compressor repeats the following discharging steps. In the sucking step, sucked coolant passed through the sucking pipe 14 passes by the sucking muffler 13, the cylinder head 11 and the valve device 12, and then flows into the cylinder 8. In the compressing step, the sucked coolant is compressed by a reciprocating motion in a straight line of a piston according to a rotation of the crankshaft 6. In the discharging step, the coolant compressed in the cylinder 8 is discharging to outside according to the course of discharging through the valve 12 and the cylinder head 11 again.

[0025] A half-circular discharging muffler 21 is mounted on the lower side of the cylinder block 9 and connected to the discharging space of the cylinder head 11 for passing through.

[0026] Accordingly, the coolant compressed inside the cylinder 8 flows into the discharging muffler 21 after passing through the discharging space of the cylinder head 11 and escapes from the closed compressor through the discharging pipe after passing the high-pressure discharging pipe 22.

[0027]FIG. 1 illustrates an uneven-type exhausting spring for the high-pressure discharging pipe according to the present invention.

[0028] Referring to FIG. 1, the uneven-type exhausting spring 25 is applied to the high-pressure discharging pipe, which is a discharging path of the compressed coolant.

[0029]FIG. 2 is a view illustrating a principle of a vibrating exhausting device according to the present invention.

[0030] Referring to FIG. 2, the principle of the vibrating exhausting device is constructed for sucking peculiar vibration of regular frequency transmitted to a first Mass M by a second mass m. That is, M never vibrate when synchronizing peculiar frequency (Equation 1) of m and k vibrating systems with problematic frequency (f). $\begin{matrix} {f_{2} = {\left( {\frac{1}{2}\pi} \right)\sqrt{\frac{k}{m}}\left( {k = {{\text{vibration coefficent,}\quad m} = \text{second mass}}} \right)}} & \left\lbrack {{Equation}\quad 1} \right\rbrack \end{matrix}$

[0031] A principle of the vibrating exhausting device is applied to the uneven-typed exhausting spring.

[0032] That is, when exciting force is added to the mass M in the second induced vibrating system without having attenuation and the mass m does not existed, the mass M receives all the vibration of an exciting factor 23.

[0033] Without the mass m,

[0034] Exciting factor 23=pulsation of compressor

[0035] M=high-pressure discharging pipe and cylindrical exhausting spring for high-pressure discharging pipe

[0036] The pulsation of the compressor is directly transferred to the discharging pipe of the compressor after passing the high-pressure discharging pipe. (Operating as one mass due to a close adhesion to the high-pressure discharging pipe.)

[0037] When the mass m exists, all exciting force of the exciting factor is sucked for vibrating but no transmitted to the mass M.

[0038] With the mass m,

[0039] Exciting factor 23=pulsation of compressor

[0040] m=uneven-typed exhausting spring for high-pressure discharging pipe

[0041] The pulsation of the compressor vibrates the mass m through the high-pressure discharging pipe but the high-pressure discharging pipe itself does not vibrate, therefore, the pulsation is transmitted to the discharging pipe of the compressor. (Operating separately as two masses by loosely assembling the spring for the high-pressure discharging pipe.)

[0042] The pulsation of the compressor is periodically generated by a rotation of a motor, which becomes the cause of having a definite problematic frequency for almost the vibration of the compressor.

[0043] A vibration mode of the high-pressure discharging pipe severely vibrates in the frequency corresponding to the double of a power frequency and several specified problematic frequencies are generated.

[0044] When a specified problematic frequency band of the high-pressure discharging pipe is over vibrated and makes a resonance, as shown in FIG. 1, an exhausting coil part of the high-pressure discharging pipe is separately vibrated without any relations to the high-pressure discharging pipe if the uneven coil part of the high-pressure discharging pipe is larger than the high-pressure discharging pipe.

[0045] The variations m and k are changed by controlling the outer and wire diameters of the exhausting coil part and the problematic frequency band of the high-pressure discharging pipe offsets the resonance.

[0046] Therefore, the uneven-typed exhausting spring may be designed to vibrate without vibrating the high-pressure discharging pipe by controlling the mass of the uneven-typed exhausting spring for fitting with the specified problematic frequency band, the wire diameter of the factor for rigidity and the size of the unevenness.

[0047] As explained in the above, the exhausting spring structure for the high-pressure discharging pipe of the compressor according to the present invention may reduce the resonance generated from the high-pressure discharging pipe and the vibration of the specified problematic frequency band by installing the uneven exhausting spring in the high-pressure discharging pipe which is the discharging path of the compressed coolant. And the exhausting spring structure may ultimately contribute to the compressor having low-vibration and low-noise.

[0048] While the present invention has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosure. In some instances, some features of the invention will be employed without a corresponding use of other features without departing from the spirit of the invention as set forth herein. 

What is claimed is:
 1. An exhausting spring structure for a high-pressure discharging pipe of a compressor, comprising the steps of: sucking so that a coolant sucked through an sucking pipe can flow into a cylinder after passing through an sucking muffler, a cylinder head and a valve device; compressing to compress said sucked coolant by a reciprocating movement of a piston in a straight line according to a rotation of a crankshaft; and discharging to discharge said compressed coolant inside said cylinder to outside according to said discharging through said valve device and said cylinder head, characterized by being installed on an external periphery of a body of a high-pressure discharging pipe, which is a discharging path of said compressed coolant, to reduce noise and vibration and control the mass by not equalizing an external diameter of said exhausting spring.
 2. The exhausting spring structure of claim 1, characterized by offsetting a resonance with problematic frequency bands of said high-pressure discharging pipe by controlling said external diameter and a wire diameter of said high-pressure discharging pipe.
 3. The exhausting spring of claim 1 or 2, wherein said external diameter of said exhausting spring is of an extended shape at a predetermined portion. 